Colnbrook School
Colnbrook School is a council special school in Watford for boys and girls aged 4 to 11. It has 130 pupils and every place is taken. About 26 in every 100 pupils come from a low-income family, about the same as most schools in England. Ofsted's last grade was outstanding, back in 2023.
Hayling Road, Watford, WD19 7UY020 8428 1281colnbrook.herts.sch.ukMs Caroline Aplin headteacherAll details
What Ofsted found
A shorter visit on 20 April 2023 found nothing to change the school's grade. Read the report on Ofsted's website.
Outstanding overall. A shorter follow-up visit found nothing to change that. The last full inspection was before September 2019, which is as far back as Ofsted's public records go, so we can't show its date or the grades for each area.
Results
Year 6 results (SATs), summer 2025
24 children took the tests. Here is how they did against every state primary in England.
All Year 6 measures, year by year
| Measure | 2025 | 2024 | 2023 | 2019 | 2018 | 2017 | Hertfordshire | England |
|---|---|---|---|---|---|---|---|---|
| Pupils tested | 24 | 23 | 28 | 18 | 15 | 24 | – | – |
| Reached the expected level at 11Expected standard in reading, writing and maths | 0% | 0% | 0% | 0% | 0% | 0% | 64% | 63% |
| Working above the expected levelHigher standard in reading, writing and maths | 0% | 0% | 0% | 0% | 0% | 0% | 10% | 8% |
| Expected level: readingReading expected standard | 0% | 0% | 0% | 0% | 0% | 0% | – | – |
| Expected level: mathsMaths expected standard | 0% | 0% | 0% | 0% | 0% | 0% | – | – |
| Expected level: writingWriting expected standard (teacher assessed) | 0% | 0% | 0% | 0% | 0% | 0% | – | – |
| Reading progressReading progress score | – | – | -5.0 | -3.9 | -6.2 | -4.6 | – | – |
| Maths progressMaths progress score | – | – | -4.5 | -5.1 | -6.8 | -4.7 | – | – |
| Expected level: low-income pupilsExpected standard, disadvantaged | 0% | 0% | 0% | 0% | – | 0% | – | – |
| Expected level: other pupilsExpected standard, non-disadvantaged | 0% | 0% | 0% | 0% | – | 0% | – | – |
There are no progress figures for 2025. That year group missed their Year 2 tests during Covid, so there was no starting point to measure from. Progress figures come back with the December 2026 results. Tests were cancelled altogether in 2020 and 2021.
Does every child do well here?
A good school does well by every child, not just on average. Each row compares two groups of pupils here. The grey marks show the same two groups across England. Every gap at this school is smaller than the gap across England. When a group has fewer than about ten pupils, its figures jump around a lot from year to year.
At the end of primary school, 2025
Low-income means the child has had free school meals at some point in the last six years. A group's figure isn't published when it has fewer than six pupils.
Getting a place
Admissions policy not published.
Each council publishes its own figures on how many families applied and how far away the last child to get a place lived. We are adding councils one at a time. If you have a link to Hertfordshire council's admissions booklet, send it to us.
Who goes here
Who the school teaches, from the latest school census.
Specialist SEND provision. A special school for pupils with autism, moderate learning difficulties, speech, language and communication.
To get a place in the unit or resourced provision, a child normally needs an education, health and care plan (EHCP) that names the school. Other schools in Hertfordshire with autism provision.
The most common needs among pupils getting extra support: Autistic spectrum disorder (58), language and communications needs (33), Specific learning difficulty (10), Severe learning difficulty (8), Moderate learning difficulty (6), emotional and mental health (6).
How the mix of pupils has changed
| Census | 2026 | 2025 | 2024 | 2023 | 2022 | 2021 |
|---|---|---|---|---|---|---|
| Pupils on roll | 130 | 129 | 112 | 113 | 111 | 102 |
| Pupils from low-income familiesFree school meals | 26% | 26% | 35% | 35% | 33% | 32% |
| Pupils learning EnglishEnglish as an additional language | 19% | 16% | 14% | 12% | 11% | 14% |
| Pupils getting extra supportSEN support | – | 0% | 0% | 0% | 0% | 0% |
| Pupils with an EHC planEducation, health and care plans | – | 100% | 100% | 100% | 100% | 100% |
Attendance and behaviour
In 2024/25 pupils were in school 90.4% of the time. Across similar schools in England it was 94.8%.
Attendance year by year
| Measure | 2024/25 | 2023/24 | 2022/23 | 2021/22 | 2020/21 | 2018/19 | England |
|---|---|---|---|---|---|---|---|
| Sessions missedOverall absence | 9.6% | 11.7% | 11.8% | 11.0% | 19.0% | 5.8% | 5.2% |
| Missed with permissionAuthorised absence | 9.6% | 10.5% | 9.9% | 9.7% | 17.9% | 5.7% | – |
| Missed without permissionUnauthorised absence | 0.0% | 1.2% | 2.0% | 1.3% | 1.1% | 0.1% | – |
| Pupils missing a lot of schoolPersistent absence | 38.6% | 28.7% | 29.2% | 33.6% | 77.6% | 11.1% | 12.8% |
| SuspensionsSuspension rate | 0.8 | 1.8 | 1.8 | 0.0 | 0.0 | – | – |
| Permanent exclusionsPermanent exclusions | 0 | 0 | 0 | 0 | 0 | – | – |
Staff and money
From the government's count of school staff in November 2025 and the school's published accounts.
Money
From the council school accounts, year to March 2025. The per-pupil figures are compared with other special schools in England that report their accounts the same way.
Reserves are the money left over at the end of the year, kept back for emergencies and big projects. Being in the red year after year is a warning sign. Very large reserves can mean money sitting in the bank instead of being spent on today's pupils. Academy figures are rounded to the nearest £1,000 and include a share of any money the trust holds centrally.
The area around the school
Crime figures come from police.uk. The police record each crime at the nearest of a fixed set of map points rather than the exact spot, so “within 500 m” is only rough. House prices are from HM Land Registry sales nearby over the last two years.
Nearby schools
The closest schools, nearest first. Hover over a row to see it on the map.
| School | Type | Distance | Pupils | Ofsted | Score | |
|---|---|---|---|---|---|---|
| Warren Dell Primary School | Academy | 90 m | 264 | Outstanding 2024 | 87 | Compare |
| St Joseph Catholic Primary School | Roman Catholic | 410 m | 239 | Outstanding 2023 | 89 | Compare |
| Oxhey Wood Primary School | Academy | 490 m | 387 | Good 2022 | 76 | Compare |
| St Meryl School | Council | 0.6 miles | 219 | Report card 2026 | 45 | Compare |
| Woodhall Primary School | Council | 0.7 miles | 76 | Good 2022 | 18 | Compare |
| Greenfields Primary School | Council | 0.8 miles | 212 | Report card 2026 | 65 | Compare |
| Bromet Primary School | Academy | 0.9 miles | 270 | Report card 2026 | 90 | Compare |
| Oxhey Nursery School | Local authority nursery school | 0.9 miles | 84 | Good 2023 | – | Compare |
Questions parents ask
Is Colnbrook School a good school?
Colnbrook School doesn't have a score yet. Ofsted rated it outstanding at its last inspection in April 2023.
What is Colnbrook School's Ofsted rating?
Ofsted rated Colnbrook School outstanding at its last full inspection on 20 April 2023.
How good are Colnbrook School's SATs results?
In summer 2025, 0% of Year 6 children reached the expected level in reading, writing and maths. Across England it was 63%. 0% went further and reached the higher level.
How many pupils does Colnbrook School have?
130 pupils aged 4 to 11 were on the roll in January 2026. It has 130 places, so it is 100% full.
What is attendance like at Colnbrook School?
Pupils were in school 90.4% of the time in 2024/25. Similar schools in England managed 94.8%. 39% of pupils missed at least a tenth of the year.
Does Colnbrook School have specialist SEND provision?
Yes. It is a special school for autism, moderate learning difficulties, speech, language and communication. To get a place there, a child normally needs an education, health and care plan (EHCP) that names the school.
These answers come straight from the figures on this page and update when new data comes out.
Contact and details
- Address
- Hayling Road, Watford, WD19 7UY
- Telephone
- 020 8428 1281
- Website
- www.colnbrook.herts.sch.uk
- Headteacher
- Ms Caroline Aplin
- Type of school
- Council special school (Community special school, special schools)
- Phase
- Special school, ages 4-11
- Gender
- Mixed
- Local authority
- Hertfordshire
- Ward
- Oxhey Hall & Hayling
- Constituency
- South West Hertfordshire
- Setting
- Urban: Nearer to a major town or city
- URN
- 117670 · LAESTAB 9197011 · UKPRN 10077074
Where these figures come from
- School details: Department for Education, Get Information About Schools, refreshed daily (this page rebuilt 13 September 2026).
- Inspections: Ofsted management information, monthly; latest publication in our data 27 August 2026.
- Year 6 results: DfE key stage 2 tables, 2024/25.
- Attendance: DfE pupil absence in schools in England, 2024/25 full year.
- Pupil characteristics: DfE school census, January 2026.
- Staff: DfE school workforce census, November 2025.
- Pupil premium: DfE allocations and conditions of grant, 2026 to 2027.
- Money: DfE financial benchmarking and insights tool, consistent financial reporting 2024/25.
- Neighbourhood: police.uk street-level crime, HM Land Registry price paid data, NaPTAN bus stops, English Indices of Deprivation 2025.
- All under the Open Government Licence v3.0. Full list and update calendar.